Sounds good, lets double the animals and lets re do some of this math here.
so we have 50x50x500, thats 1,250,000 sq ft divided by your 32000 animals, thats 39 cubic feet per animal/3 so you have a 13x13x13 foot cell. /4, one quarter of the cell can be for food, the other quarter for waste, the last half for the animal.
So for every animal, you have a 6.5 foot cell.
Now, this ignores the need for things like stairs in between levels. This ignores thickness of the walls, thickness of the floors and cieling. The boat isnt made of paper. This ignores any form of support, or support beams throughout the ark. This ignores any form of walkway in between cells for noah to walk so he can get to every baby animal to feed them with the breast milk supplied by the mother giraffes (3 days worth).
This ignores any need for cleaning supplies. Anyone who knows about babies knows they can poop multiple times a day. So, presumably there will be cleaning supplies.
Bowls, bowls for the food to sit in so the feces doesnt mix with your food, you need some form of divider between the two. Another divider to keep the feces from the animal.
So, all of a sudden this 6.5 foot cell (which is already small as it is), is increasingly shrinking. These animals need water as well. So, add in containers for that water. And these animals need to be able to breath. will there be any ventilation or will they suffocate from poop gas?
Well, I'm not really going to argue the size/animal points with you anymore. I've already shown it was possible to hold all of the animals...even when the number of animals was doubled....Time to move on.
At the bottom of your post you brought up ventilation. You asked:
And these animals need to be able to breath. will there be any ventilation or will they suffocate from poop gas?
Once again let me direct you to Woodmorappes book:
The following is from Noahs Ark, A Feasibility Study p41
by John Woodmorappe
It should show you that just the windows alone would have provided adequate ventilation.
What Drove the Ventilation of the Ark? For the quoted rate of five Ark air changes per hour
(Table 7), external wind was more than adequate to effect the required turnover of air in the Ark.
At a wind velocity of merely 5 km/hr (calm), an opening of 0.093 square meters is sufficient to admit 420 cubic meters of fresh air an hour (Gay 1924, p. 255). This changes to only 0.0186 square meters at a wind velocity of 20.9 km/hr (light breeze), and 0.0116 square meters at 37 km/hr (moderate breeze). To put these figures in perspective, we need to remember that the area of the entire Ark window was 146 square meters, and the area of the window of only the short side of the Ark facing the oncoming wind was 10.5 square meters. The total inlet areas for the three different wind velocities, quoted above, are 46.7,18.7, and 9.33 square meters, respectively. It is obvious that only a small fraction of the Ark window needs to be open for adequate ventilation, even at quite low wind velocities.
To investigate this point further, I have determined the minimum wind speed necessary to adequately ventilate the Ark. In this calculation, I have assumed that the Ark was continuously oriented with its long axis approximately collinear with the direction of the wind. I then performed calculations based on the formula in Stowell and Bickert (1993, p. 395) for windows set at different angles to the prevailing wind. The results of my calculations are as follows (in minimum km/hr of wind): 33.5, 13.5. and 9.6. The largest value assumes that the short side of the Ark is perpendicular to the incoming wind, and any wind entering the long-walled Ark windows is negligible. The second value assumes that the short-side windows are closed, and the ventilation is solely from side-glancing wind going past the long sides of the Ark, at an opening effectiveness of 0.25. The last value is for an ideal situation where both the short-side and long-side Ark windows are used simultaneously for ventilation, and the Ark is oriented at an angle to the wind that causes the windows to have opening effectiveness values of 0.6 and 0.25 respectively. In light of the stormy conditions at the start of the Flood, and the continuous wind which was drying the earth afterward (Genesis 8:1), it is certain that there was more than enough wind available for the ventilation of the Ark.
I hope that answers the question about poop gas.